﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;

namespace WeChatParking.Util
{
    public static class Security
    {
        /// <summary>
        /// MD5加密
        /// </summary>
        /// <param name="input">字符串</param>
        /// <returns></returns>
        public static string GetMd5Hash(string input)
        {
            // Create a new instance of the MD5CryptoServiceProvider object.

            MD5 md5Hasher = MD5.Create();

            // Convert the input string to a byte array and compute the hash.

            byte[] data = md5Hasher.ComputeHash(Encoding.UTF8.GetBytes(input));

            // Create a new Stringbuilder to collect the bytes

            // and create a string.

            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 

            // and format each one as a hexadecimal string.

            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // Return the hexadecimal string.

            return sBuilder.ToString();
        }

        // Verify a hash against a string.
        /// <summary>
        /// 验证MD5加密
        /// </summary>
        /// <param name="input">字符串</param>
        /// <param name="hash">MD5值</param>
        /// <returns>true 相等；false 不相等</returns>
        public static bool VerifyMd5Hash(string input, string hash)
        {
            // Hash the input.

            string hashOfInput = GetMd5Hash(input);

            // Create a StringComparer an compare the hashes.

            StringComparer comparer = StringComparer.OrdinalIgnoreCase;

            if (0 == comparer.Compare(hashOfInput, hash))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// SHA1加密
        /// </summary>
        /// <param name="strIN">需要加密的字符串</param>
        /// <returns>密文</returns>
        public static string GetSha1Hash(string Source_String)
        {
            byte[] StrRes = Encoding.Default.GetBytes(Source_String);
            HashAlgorithm iSHA = new SHA1CryptoServiceProvider();
            StrRes = iSHA.ComputeHash(StrRes);
            StringBuilder EnText = new StringBuilder();
            foreach (byte iByte in StrRes)
            {
                EnText.AppendFormat("{0:x2}", iByte);
            }
            return EnText.ToString();
        }
    }
}
